wcvdli.cpp

开放源码的编译器open watcom 1.6.0版的源代码

#include <wclistit.h>
#include <iostream.h>


//
// insert elem after all elements in the list less than or equal to
// elem
//

void insert_in_order( WCValDList<int> &list, int elem ) {
    if( list.entries() == 0 ) {
        // cannot insert in an empty list using a iterator
        list.insert( elem );
    } else {

	WCValDListIter<int> iter( list );
	while( ++iter ) {
	    if( iter.current() > elem ) {
	        // insert elem before first element in list greater
		// than elem
		iter.insert( elem );
		return;
	    }
	}

	// iterated past the end of the list
	// append elem to the end of the list
	list.append( elem );
    }
}


void main() {
    WCValDList<int> list;
    
    insert_in_order( list, 5 );
    insert_in_order( list, 20 );
    insert_in_order( list, 1 );
    insert_in_order( list, 25 );

    cout << "List elements in ascending order:\n";

    WCValDListIter<int> iter( list );
    while( ++iter ) {
	cout << iter.current() << "\n";
    }

    cout << "List elements in descending order\n";

    // iterator is past the end of the list
    while( --iter ) {
	cout << iter.current() << "\n";
    }
}